Japanese first Nobel Prize Winner's story

Last night's TV program featured about one Japanese Nobel prize winner who also was involved in abolishing nuclear weapons from the earth.He had very significant and fundamental discovery in physics,but he also felt pity about the fact that development of science sometimes causes terrible tragedy like atomic bomb dropped at Hiroshima.Though he cooperated together with another world famous scientist Einstein in order to realize peaceful world free from nuclear weapon,the majority of opinion was against them under the theory that holding weapon will play a role of preventing the world from confusion like breaking out wars.THough nowadays opinions are still divided in the same way,I was impressed by the old and great physician Hideki Yukawa's patient effort to make his dream come true.